Answer in brief
CVE-2026-64548 records a High severity (CVSS 8.4) vulnerability in bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <a12b1575f9feabd91695a9e9d004862f7195fa25 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <888706a76286c547bd035432602571e8024b5305 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <db77b6bb6e6edb79b10b4efcce346eec5582d588 || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <4e40056bb5c829f0423f0a6694a0477726d2147e || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <bd004716ba75fed6d185795c85cdc92540ebeaab || >=6fff607e2f14bd7c63c06c464a6f93b8efbabe28 <0c0a8ed85349dae298712d79cb276acfeb794d82 | f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5, a12b1575f9feabd91695a9e9d004862f7195fa25, ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d, 888706a76286c547bd035432602571e8024b5305, db77b6bb6e6edb79b10b4efcce346eec5582d588, 4e40056bb5c829f0423f0a6694a0477726d2147e, bd004716ba75fed6d185795c85cdc92540ebeaab, 0c0a8ed85349dae298712d79cb276acfeb794d82 |
| Linux/Linuxgeneric | 4.20 | Not reported |
Published upstream
Jul 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data() When the scatterlist ring is full or nearly full, bpf_msg_push_data() enters a copy fallback path and computes copy + len for the page allocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING and both are u32, a crafted len can wrap the sum to a small value, causing an undersized allocation followed by an out-of-bounds memcpy. BUG: unable to handle page fault for address: ffffed104089a402 Oops: Oops: 0000 [#1] SMP KASAN NOPTI Call Trace: __asan_memcpy (mm/kasan/shadow.c:105) bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788) bpf_prog_9ed8b5711920a7d7+0x2e/0x36 sk_psock_msg_verdict (net/core/skmsg.c:934) tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584) __sys_sendto (net/socket.c:2206) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Add an overflow check before the allocation.
Quoted source text, attributed separately from HOL analysis.